there are no actual 'breeds' of rats, just different standards.
Ears come in two types; dumbo (lower set on the head) and standard
Coats come in my varieties; rex (wavy or curly), double rex (also know as patchwork, their hair will grow in once a month then fall out leaving them looking hairless), harley (long coat), silky (a smooth coat with no guard hairs) and standard
Markings are the most numerous, come more common ones are; Self (no white on the body), berkshire, (white belly, paws and tip of tail), and hooded
And eyes; pink (seen on most 'albinos'), ruby (appears black unless hit with a direct light), black and odd-eyed (an eye one color and the other a different color)
I hope this is what you're looking for, if not let me know.
Ears come in two types; dumbo (lower set on the head) and standard
Coats come in my varieties; rex (wavy or curly), double rex (also know as patchwork, their hair will grow in once a month then fall out leaving them looking hairless), harley (long coat), silky (a smooth coat with no guard hairs) and standard
Markings are the most numerous, come more common ones are; Self (no white on the body), berkshire, (white belly, paws and tip of tail), and hooded
And eyes; pink (seen on most 'albinos'), ruby (appears black unless hit with a direct light), black and odd-eyed (an eye one color and the other a different color)
I hope this is what you're looking for, if not let me know.